The correct option is B Bog
Eutrophication
Eutrophication is a process in which a lake is highly enriched with nutrients like phosphorus, nitrogen, etc. in its water.
Peat
he accumulation of partially decayed vegetation or organic matter is called peat. Also, peat is a rich carbon source. It is generally found in wetland areas.
Bog
Bogs are large masses of floating plants, formed by rooting of marsh plants in the shallows that fill the original lake basin. During eutrophication, marsh plants eventually give way to large masses of floating plants called Bog.
Plankton
Planktons are microscopic plants (phytoplanktons) and animals (zooplanktons) floating in water bodies. They drift with water currents and live suspended in the water column.
Bloom
Bloom, more specifically algal bloom, is the excessive growth of planktonic algae in a water body. Algal bloom causes deterioration in the water quality and fish mortality.